5-GHz Wideband Acoustic Filter with FBW of 20% Based on Z-Cut Lithium Niobate
This work presents A1-mode Lamb wave resonators based on Z-cut lithium niobate thin film to realize acoustic filters at 5 GHz. By using half-electrode reflectors and fin-type anchors, a high-performance resonator with excellent Figure of Merit (FoM) up to 316 has been implemented. The fabricated ladder-type filter achieves a 3-dB bandwidth (3dB-BW) of 990 MHz, equivalent to a fractional bandwidth (FBW) of 20% and an insertion loss (IL) of 1.85 dB at 4990 MHz. This demonstration proves great potential of Lamb wave acoustic filters based on lithium niobate for future 6G and Wi-Fi 7 applications.
Authors
- Fuhong Lin (ORCID: https://orcid.org/0009-0006-4520-9993)
- Chengjie Zuo (ORCID: https://orcid.org/0000-0002-7520-349X)
- Haoran Tao (ORCID: https://orcid.org/0000-0002-8099-3377)
- Jie Chen (ORCID: https://orcid.org/0000-0003-2449-9793)
- Kai Yang (ORCID: https://orcid.org/0009-0006-2204-548X)
- Jiming Fang (ORCID: https://orcid.org/0009-0003-9050-0155)
Institutions
- University of Science and Technology of China (CN)
Publication Details
- Published
- 2024-09-22
- DOI
- https://doi.org/10.1109/uffc-js60046.2024.10793715
- Citations
- 1
- Primary Topic
- Acoustic Wave Resonator Technologies
- Type
- article
- Field-Weighted Citation Impact
- 0.18
Funders
- National Natural Science Foundation of China
- National Key Research and Development Program of China